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I damaged my tranny this morning in an accident and the dealer says 4600 to replace the unit. Instead of putting the same weak A$$ one back in I am thinking of going with an STI swap. I found one that has everything but the brakes and the wireharness for the controler for 4k. Can I buy a harness from Subaru?? Any suggestions would be appreciated.

idk how the 2011 is, but I think you will need to have the dccd controler as well, the speed cluster which has the modules, the i controller, the rear diff with the sencor, and maybe the axels? since sti ones are thicker. At least on an 07, thats how it is.

yes, I found a kit that includes everything from suspension to brakes and rear diff. the other kit includes everything except calipers and rotors. But does include the spindles and hubs if i need them.

I would like to do Brakes also so I am trying to get a kit that includes them> if i can't I will just use my axles and hubs and save the STI ones until I do find the calipers and rotors. My wheels are dual drilled so there is no worries there. We are looking at all options. The stock WRX tranny is not that strong and the diff part of it broke with ease. I'd rather get a stronger tranny to hold all future mods and HP.

The sti brakes are much beefier, if financially you can, its a much better choice.

Well, not necessarily.

The STI brakes are heavier and will not stop the car any faster or shorter than OEM WRX brakes. And depending on what he's using the car for, the WRX brakes may in fact be better from a performance standpoint.

He can also probably hybridize the axles to work with both the STI trans and WRX hubs.

Ummm...what's not clear? The front axles are PnP, the rears are not and will require changing to SpecB or custom DSS. I have done this exact swap into a 2009 WRX.

Quote:

Originally Posted by Annihilator817

So, what are the splines different at the diff?

You can't hybridize the WRX axle with the STI axle?

Yes, the R180 uses different inners at the diff and outers at the hub, just like they have been since the very first USDM STi. Using an R180 means using an R180 inner, and the only way to get an R180 inner with an R160 outer is through a SpecB axle ($379.99 retail, each) or a set of DSS custom axles ($1000 retail, or more if you want one of their stronger hub&outer setups).

OP: if you want a 6 speed, trade it in on an STI. You'll NEVER have the same level of integration for anywhere near the same price as just making the jump now. For instance, the only way to get DCCD control is through a third party controller (DCCDPro). To get the factory DCCD controller and controls in the car will require a body harness and all modules swap, effectively turning the car into an STI but in a WRX shell.

I still have a hard time understanding why people buy WRX Limiteds (and for $30k+!) and then immediately start trying to make them into an STI with a 6MT and Brembos and yadda...I walked for way less than $34k on a new '13 STI. The cost difference is effectively the same as a 6 speed alone...and it's a better car from front to back, inside and out.

Ummm...what's not clear? The front axles are PnP, the rears are not and will require changing to SpecB or custom DSS.

Yes, the R180 uses different inners at the diff and outers at the hub, just like they have been since the very first STi.

OP: if you want a 6 speed, trade it in on an STI. You'll NEVER have the same level of integration.

I still have a hard time understanding why people buy WRX Limiteds (and for $30k+!) and then immediately start trying to make them into an STI with a 6MT and Brembos and yadda...I walked for way less than $34k on a new '13 STI. The cost difference is effectively the same as a 6 speed alone...and it's a better car from front to back, inside and out.

You know how I know you don't have the foggiest clue about drivetrain swapping a Subaru?

EDIT: And if you think your WRX brakes, with their single piston floating rear calipers and non-vented discs, are just as good as STI Brembos from a performance standpoint, well, you bought in hook line and sinker on the salesmen that convinced you a "WRX is the same as an STI, just for cheaper".

I answered your question. Using an R180 means using an axle that has an R180 inner. It has to also go into an R160/WRX/non-sti/5x100/whateveryouwannacall it, which means using an R160 outer.

Subaru doesn't make that axle, except for the SpecB, which was incredibly rare, so procuring these axles means buying new or waiting around for another SpecB to get totalled or something.

Or he can also swap hubs and use full R180 rear stuff, at which point it sounds like he will also have to change brake calipers...do you see where this is going? By the time you total up the list of parts you need to buy/swap to do it right, most people could have bought an STI and been done a whole lot faster.

I paid 27K for my limited. I didnt plan on the tranny ****ting the bed because of hitting a pot hole while on the gas. I figured since its broke why throw the same weak crap back in it. I don't like the idea of putting gears into it that are going to be loud and I would still have the same weak front diff that broke to begin with. Any sugestions would be greatfully appreciated. And there were no STi's available with a moonroof in my area.

I answered your question. Using an R180 means using an axle that has an R180 inner. It has to also go into an R160/WRX/non-sti/5x100/whateveryouwannacall it, which means using an R160 outer.

Subaru doesn't make that axle, except for the SpecB, which was incredibly rare, so procuring these axles means buying new or waiting around for another SpecB to get totalled or something.

Or he can also swap hubs and use full R180 rear stuff, at which point it sounds like he will also have to change brake calipers...do you see where this is going? By the time you total up the list of parts you need to buy/swap to do it right, most people could have bought an STI and been done a whole lot faster.

Or he can take the STI axle apart and the WRX axle apart and assemble a hybrid axle with an STI inner spline and anWRX outer spline?

This is how it is often done with other brands, and I recall hearing something about this with the GD's.

Are you familiar with this method, or are you more of a "if it doesn't bolt right up its over my head" type of person? Because that's the feel I'm getting from you.